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validaçao cnpj python
1 class Cnpj:
2 def __init__( self ):
3 """
4 Class to interact with Cnpj brazilian numbers
5 """
6 pass
7
8 def validate( self, cnpj ):
9 """
10 Method to validate brazilian cnpjs
11 Tests:
12
13 >>> print Cnpj().validate('61882613000194')
14 True
15 >>> print Cnpj().validate('61882613000195')
16 False
17 >>> print Cnpj().validate('53.612.734/0001-98')
18 True
19 >>> print Cnpj().validate('69.435.154/0001-02')
20 True
21 >>> print Cnpj().validate('69.435.154/0001-01')
22 False
23 """
24 # defining some variables
25 lista_validacao_um = [5, 4, 3, 2, 9, 8, 7, 6, 5, 4 , 3, 2]
26 lista_validacao_dois = [6, 5, 4, 3, 2, 9, 8, 7, 6, 5, 4, 3, 2]
27
28 # cleaning the cnpj
29 cnpj = cnpj.replace( "-", "" )
30 cnpj = cnpj.replace( ".", "" )
31 cnpj = cnpj.replace( "/", "" )
32
33 # finding out the digits
34 verificadores = cnpj[-2:]
35
36 # verifying the lenght of the cnpj
37 if len( cnpj ) != 14:
38 return False
39
40 # calculating the first digit
41 soma = 0
42 id = 0
43 for numero in cnpj:
44
45 # to do not raise indexerrors
46 try:
47 lista_validacao_um[id]
48 except:
49 break
50
51 soma += int( numero ) * int( lista_validacao_um[id] )
52 id += 1
53
54 soma = soma % 11
55 if soma < 2:
56 digito_um = 0
57 else:
58 digito_um = 11 - soma
59
60 digito_um = str( digito_um ) # converting to string, for later comparison
61
62 # calculating the second digit
63 # suming the two lists
64 soma = 0
65 id = 0
66
67 # suming the two lists
68 for numero in cnpj:
69
70 # to do not raise indexerrors
71 try:
72 lista_validacao_dois[id]
73 except:
74 break
75
76 soma += int( numero ) * int( lista_validacao_dois[id] )
77 id += 1
78
79 # defining the digit
80 soma = soma % 11
81 if soma < 2:
82 digito_dois = 0
83 else:
84 digito_dois = 11 - soma
85
86 digito_dois = str( digito_dois )
87
88 # returnig
89 return bool( verificadores == digito_um + digito_dois )
90
91 def format( self, cnpj ):
92 """
93 Method to format cnpj numbers.
94 Tests:
95
96 >>> print Cnpj().format('53612734000198')
97 53.612.734/0001-98
98 """
99 return "%s.%s.%s/%s-%s" % ( cnpj[0:2], cnpj[2:5], cnpj[5:8], cnpj[8:12], cnpj[12:14] )
100
101 # tests
102 #import doctest; doctest.testmod()
Source: wiki.python.org.br
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